For centuries, the techniques and secrets of the Old Masters have been shrouded in mystery. Now, a groundbreaking study published in the journal Nature Communications has shed new light on the methods used by some of history’s most skilled painters, including Leonardo da Vinci, Sandro Botticelli, and Rembrandt.

Source: media.cnn.com

The Secret Ingredient: Egg Yolk

According to the study, these renowned artists may have used proteins, particularly egg yolk, in their oil paintings. The researchers discovered trace quantities of protein residue in classic oil paintings, which were previously attributed to contamination. However, the study suggests that the inclusion of protein was likely intentional, providing valuable insights into the technical knowledge of the Old Masters.